In Zolyx the player controls a cursor that moves along the screen in the four cardinal directions, trailing out a line behind it. The player's cursor moves continuously and must avoid a variety of obstacles. Regions of the screen are isolated by the line and are then changed to a different color, effectively winning them for the player. The player must gain 75% or more of the screen to progress.
Conceptually, the game is similar to the much better known QIX